Photo of the day (80): Tonna galea 2

Tonna galea is a large sea snail, that belongs to the family Tonnidae. It is family of predatory gastropods.

My Tonna galea is from southern Croatia.

Video of crawling Tonna galea on the sand in an aquarium (there is no audio):

Another video of the same Tonna galea (no audio):

The frontal view of Tonna galea usually looks like this:

Tonna galeaWhile this is the view of the same specimen of Tonna galea with extended proboscis:

Tonna galea with extended proboscisProboscis is the darker part coming from its head.

Proboscis is a prehensile tube and there is a mouth at the end of the proboscis. Therefore it is an important part of the body of the sea snail. Proboscis is well innervated (there are nerves inside the wall of proboscis) and there are glands next to the proboscis. I found no exact measurements of the proboscis of such big Tonna galea sea snails in the literature.

References

Simone L. R. L. de 1995: Anatomical study on Tonna galea (Linné, 1758) and Tonna maculosa (Dillwyn, 1817) (Mesogastropoda, Tonnoidea, Tonnidae) from Brazilian region. Malacologia 37(1): 23-32.